When anyone pass the puppy then it will block the visible light that incident upon it
So here we are blocking the visible part of light by passing the puppy which means we have to design a sensor that will sense the visible light.
So here the electromagnetic part of the sensor is capable to detect this change only
so here correct answer must be
<u><em>B. Visible Light</em></u>
Normal force is mass x gravity, so mass x 9.81
Answer: 1. A Unbalanced force and net force
Explanation:
The combination of all forces acting on a object is called a Net Force, and a Unbalanced force can cause an object to stop, start moving or change direction.
KE = 1/ 2 * 1252 * 144
as KE = 1/2 * m * v ^2
= 90144 J
Answer:
height is 4 times
Explanation:
speed of ball hit by Luis is u
speed of ball hit by Ron is 2u
Let the maximum height traveled by the ball hit by Luis is h and by the ball hit by Ron is h'
At maximum height, the final velocity of ball is zero in both the cases.
Use third equation of motion, we get
For Luis :
.... (1)
For Ron :
.... (2)
Divide equation (2) by equation (1), we get
h' = 4 h
Thus, the statement of third student is wrong.